Total Bridges
2,542
Public highway bridges in New Hampshire
State profile · Near median Poor share
New Hampshire bridge safety
Condition ratings, load ratings, and Poor-condition data for every public highway bridge in New Hampshire, based on the FHWA National Bridge Inventory.
- 2,542
- Public bridges
- 43.0%
- Good condition
- 7.1%
- Poor condition
Data updated May 2026
Good Condition
43.0%
1,092 bridges rated 7-9
-7.0pp vs 50% benchmark
Poor Condition
7.1%
180 bridges whose lowest applicable component is rated 0-4
0.1pp vs national avg 7.0%
New Hampshire vs national bridge condition
New Hampshire - Good condition share 43.0%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
New Hampshire - Poor-condition share 23.6%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
New Hampshire vs nearby ranks
Adjacent states by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below New Hampshire on the same metric.
NY
New York
6.90% top marginal rate
KY
Kentucky
7.06% top marginal rate
NH
New Hampshire
7.08% top marginal rate
OK
Oklahoma
7.50% top marginal rate
NM
New Mexico
7.61% top marginal rate
Bridges Needing Most Attention in New Hampshire
Six lowest-condition bridges in New Hampshire, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
OLD DEERFIELD ROAD
PoorOver: BROOK
185 FT FROM NH RTE 43, Rockingham, NH
Built 1920 Load: 1.8 t ADT: 190
TEMPLETON TURNPIKE
PoorOver: PRIEST BROOK
1.9MI. RTE 119, Cheshire, NH
Built 1984 Load: 2.7 t ADT: 86
DUDLEY ROAD
PoorOver: LAMPREY RIVER
.23 MI JCT 101, Rockingham, NH
Built 1914 Load: 2.9 t ADT: 535
SHOP ROAD
PoorOver: NEEDLE SHOP BROOK
0.8 MI N NEW CHESTER RD, Merrimack, NH
Built 1930 Load: 3.3 t ADT: 63
WHITCOMB MILLS RD
PoorOver: WHITE BROOK
0.06 MI FR ARCH ST, Cheshire, NH
Built 1940 Load: 3.6 t ADT: 814
LEIGHTON MEADOW RD
PoorOver: PHILLIPS BROOK
100 FT FR SULLIVAN RD 61, Coos, NH
Built 1940 Load: 3.6 t ADT: 90
All Bridges in New Hampshire
I-93 NB
UnknownOver: MIRROR LAKE ROAD
0.24 MI THORNTON TL, Grafton, NH
Built 1970 ADT: 100
I-93 SB
UnknownOver: US 3,NHRR
1.72 MI THORNTON TL, Grafton, NH
Built 1970 ADT: 960
I-93 NB
UnknownOver: US 3,NHRR
1.72 MI THORNTON TL, Grafton, NH
Built 1970 ADT: 960
I-93 SB
UnknownOver: NH175
2.57 MI THORNTON TL, Grafton, NH
Built 1972 ADT: 450
I-93 NB
UnknownOver: NH175
2.57 MI THORNTON TL, Grafton, NH
Built 1972 ADT: 450
NH122,MAIN ST
UnknownOver: NH101
2.8 MI MILFORD TL, Hillsborough, NH
Built 1969 ADT: 13,000
NH101
UnknownOver: THORNTONS FERRY ROAD
2.3 MI MILFORD TL, Hillsborough, NH
Built 1971 ADT: 530
NH101
UnknownOver: BOSTON POST RD,BEAVER BK
1.56 MI MILFORD TL, Hillsborough, NH
Built 1969 ADT: 3,800
NH101
UnknownOver: NH122
1.3 MI MILFORD TL, Hillsborough, NH
Built 1969 ADT: 4,600
NH101
UnknownOver: MERRIMACK ROAD
0.7 MI MILFORD TL, Hillsborough, NH
Built 1969 ADT: 1,700
OLD BEDFORD ROAD
UnknownOver: NH114
0.4 MI JCT 101, Hillsborough, NH
Built 1964 ADT: 22,000
PLUMMER ROAD
UnknownOver: NH101
0.5 MI JCT RT 114, Hillsborough, NH
Built 1995 ADT: 36,200
I-293 SB OFF RAMP
UnknownOver: US 3
NH101/US3/I-293 Int'chg, Hillsborough, NH
Built 2006 ADT: 25,000
NH101 WB
UnknownOver: US 3
NH101 WB OVER US 3, Hillsborough, NH
Built 2006 ADT: 25,000
NH101 EB
UnknownOver: US 3
NH101 EB over US 3, Hillsborough, NH
Built 2006 ADT: 25,000
NH101 WB
UnknownOver: I-293(RAMP D)
.2 MI JCT RT 3, Hillsborough, NH
Built 1959 ADT: 13,000
NH101 WB
UnknownOver: FEE TPK
.3 MI JCT RT 3, Hillsborough, NH
Built 1993 ADT: 46,000
I-293 EB,NH101 EB
UnknownOver: FEE TPK
.3 MI E JCT US 3, Hillsborough, NH
Built 1993 ADT: 45,232
US 3
UnknownOver: FEE TPK
0.4 MI JCT RT101, Hillsborough, NH
Built 2013 ADT: 45,232
FEE TPK
UnknownOver: WIECZOREK DR
1/4 MILE SOUTH FROM TOLL, Hillsborough, NH
Built 2010 ADT: 6,000
TOLL PLAZA ACCESS
UnknownOver: FEE TPK NB ON-RAMP
1/4 SOUTH OF PLAZA, Hillsborough, NH
Built 2010 ADT: 3,000
FEE TPK NB RAMP
UnknownOver: WIECZOREK DR RAMP
0.2 MILES WEST OF TPK, Hillsborough, NH
Built 2011 ADT: 2,000
WIECZOREK DR
UnknownOver: US 3
.4 M WEST OF I-93, Hillsborough, NH
Built 2011 ADT: 22,000
WIECZOREK DR
UnknownOver: MERRIMACK R,NH 3A,CSX
1 MILE WEST OF MHT, Hillsborough, NH
Built 2011 ADT: 8,500
NH 9
UnknownOver: BEARDS BROOK,BEARDS RD
NH 9 at Beards Brook, Hillsborough, NH
Built 2002 ADT: 460
NH 9
UnknownOver: US202
JCT NH 9/US202, Hillsborough, NH
Built 2001 ADT: 6,300
BIBLE HILL ROAD
UnknownOver: NH 9,RAMP A
NH 9 under Bible Hill Ro, Hillsborough, NH
Built 2000 ADT: 6,300
BIBLE HILL ROAD
UnknownOver: US202
Bible Hill Road / US202, Hillsborough, NH
Built 2000 ADT: 6,300
CENTER ROAD
UnknownOver: US202,NH 9
2.2MI W HENNIKER T/L, Hillsborough, NH
Built 2002 ADT: 8,400
OLD HENNIKER ROAD
UnknownOver: US202,NH 9
1.2MI W HENNIKER T/L, Hillsborough, NH
Built 2002 ADT: 13,000
US202,NH 9
UnknownOver: HENNIKER ST
0.8MI W HENNIKER T/L, Hillsborough, NH
Built 2002 ADT: 8,600
I-293,FEE TPK
UnknownOver: HACKETT HILL ROAD
.2MI S HOOKSETT T.L., Hillsborough, NH
Built 1956 ADT: 2,800
RIVER ROAD
UnknownOver: I-93
0.01 S HOOK-MANCH TL, Hillsborough, NH
Built 1975 ADT: 63,072
I-293,FEE TPK SB
UnknownOver: NH 3A
2.MI S HOOKSETT T.L., Hillsborough, NH
Built 1956 ADT: 18,000
I-293,FEE TPK NB
UnknownOver: NH 3A
2.MI S HOOKSETT T.L., Hillsborough, NH
Built 1957 ADT: 18,000
I-293,FEE TPK
UnknownOver: STARK WAY
1.9MI S HOOKSETT T.L., Hillsborough, NH
Built 1956 ADT: 200
NH 28A
UnknownOver: I-93
0.1 MI HOOKSETT TL, Hillsborough, NH
Built 1976 ADT: 69,000
SALMON STREET WB
UnknownOver: MERRIMACK RIVER,CSX,RD
.3MI W JCT US 3, Hillsborough, NH
Built 1970 ADT: 7,800
NORTH RAMP
UnknownOver: I-293,FEE TPK
.5MI FROM STARK LANE, Hillsborough, NH
Built 1957 ADT: 45,000
SALMON STREET EB
UnknownOver: MERRIMACK R,CSX,RD,RAMP
0.3MI W OF JCT RT 3, Hillsborough, NH
Built 1970 ADT: 7,500
SOUTH RAMP
UnknownOver: I-293,FEE TPK
AT AMOSKEAG INTERCHANGE, Hillsborough, NH
Built 1957 ADT: 54,000
NH101
UnknownOver: NH 28 BYPASS
.2 MI W. AUBURN T.L., Hillsborough, NH
Built 1961 ADT: 15,000
I-93 NB
UnknownOver: WELLINGTON ROAD
0.2 MI E JCT RTE 28, Hillsborough, NH
Built 1976 ADT: 14,000
KELLEY STREET
UnknownOver: PISCATAQUOG R,CSX,RD
0.3 MI E JCT RTE 114-A, Hillsborough, NH
Built 1973 ADT: 100
I-93 SB
UnknownOver: WELLINGTON ROAD
0.2 MI E JCT RTE 28, Hillsborough, NH
Built 1976 ADT: 14,000
BRIDGE STREET WB
UnknownOver: I-293,NH 3A,CSX,MERR R
0.4 MI FROM ELM ST INV#8, Hillsborough, NH
Built 1990 ADT: 82,000
BRIDGE STREET EB
UnknownOver: I-293,NH 3A,CSX,MERR R
0.4 MI FROM ELM ST INV#8, Hillsborough, NH
Built 1988 ADT: 82,000
NH101 WB
UnknownOver: I-93 SB OFF RAMP
AT STEVENS POND, Hillsborough, NH
Built 1961 ADT: 53,000
I-93 NB
UnknownOver: NH101 WB,SBE RAMP
0.05 MI N JCT BRIDGE ST, Hillsborough, NH
Built 1977 ADT: 27,000
I-93 SB
UnknownOver: BRIDGE STREET
1.2 MI W JCT NH28 BYP, Hillsborough, NH
Built 1977 ADT: 2,600
Showing 51-100 of 2,542 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.